LTS 15-NP/SP7 Current Transducer Equivalent & Substitute Parts

Part Overview

The LTS 15-NP/SP7 is a current transducer manufactured by LEM USA Inc., designed for AC/DC current measurement applications. This Hall Effect, closed-loop bidirectional current sensor operates with a 15A sensing range and provides ratiometric voltage output. The product is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new design implementations.

Substiute Parts

LTS 15-NP/SP7

LEM USA Inc.In Stock: 863LTS 15-NP/SP7 Datasheet

Current PartRFQ

T60404N4646X651

VACUUMSCHMELZEIn Stock: 3309T60404N4646X651 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LTS 15-NP/SP7 is determined by the following critical parameters:

Functional Compatibility Criteria:

• Closed-loop current sensing topology
• Single-channel configuration
• Ratiometric voltage output
• DC to 200kHz frequency response capability
• Supply voltage range: 4.75V to 5.25V
• Through-hole mounting capability
• Operating temperature range: -40°C to 85°C

Current Sensing Range Consideration: The LTS 15-NP/SP7 operates at 15A. Substitute parts with higher current sensing ratings (such as 25A) remain functionally compatible for applications requiring measurement of currents within or below the original 15A specification, provided all other electrical and mechanical parameters align.

Polarization Difference: The LTS 15-NP/SP7 is bidirectional. Substitute parts with unidirectional polarization are compatible only for applications where current flow direction is unidirectional and does not require bidirectional measurement capability.

Parameter Comparison

Engineering Selection Recommendations

T60404N4646X651 as Substitute for LTS 15-NP/SP7:

The T60404N4646X651 manufactured by VACUUMSCHMELZE is an active product suitable for replacing the obsolete LTS 15-NP/SP7 in applications meeting the following conditions:

Compatibility Factors:

• Both devices operate within identical supply voltage ranges (4.75V to 5.25V)
• Both support DC to 200kHz frequency response
• Both maintain ±0.1% linearity specification
• Both operate across the full -40°C to 85°C temperature range
• Both feature through-hole mounting and single-channel configuration
• Both provide ratiometric voltage output

Compliance Status: The T60404N4646X651 holds ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The LTS 15-NP/SP7 holds RoHS compliance, indicating both parts satisfy environmental standards for their respective production periods.

Application Constraints: The T60404N4646X651 operates with unidirectional polarization, whereas the LTS 15-NP/SP7 is bidirectional. This substitution is valid only for applications where current measurement is unidirectional or where bidirectional capability is not required.

The T60404N4646X651 supports a 25A sensing range compared to the 15A range of the LTS 15-NP/SP7. This higher rating does not preclude substitution for 15A applications, as the device remains functional within the lower current specification.

The accuracy specification of the T60404N4646X651 is ±0.7% compared to ±0.2% for the LTS 15-NP/SP7. Applications requiring the tighter ±0.2% accuracy specification must evaluate whether the ±0.7% tolerance is acceptable for system performance.

Frequently Asked Questions (FAQ)

Q: Can the T60404N4646X651 directly replace the LTS 15-NP/SP7 in all applications?

A: The T60404N4646X651 is compatible with applications where current flow is unidirectional. If the original application requires bidirectional current measurement, the unidirectional polarization of the T60404N4646X651 makes it unsuitable without circuit redesign.

Q: What is the impact of the higher 25A current sensing range on a 15A application?

A: The T60404N4646X651 with a 25A range functions correctly for currents up to 15A. The higher range does not degrade performance within the 15A specification window. However, sensitivity characteristics differ between the two devices due to their different current ranges.

Q: How does the accuracy difference between ±0.2% and ±0.7% affect system design?

A: The T60404N4646X651 has a wider accuracy tolerance of ±0.7% compared to the LTS 15-NP/SP7 at ±0.2%. Applications with strict accuracy requirements must evaluate whether this 0.5% difference is acceptable. Signal conditioning or calibration adjustments may be necessary.

Q: Are the package types compatible from a mechanical standpoint?

A: The LTS 15-NP/SP7 uses a single pass-through module package, while the T60404N4646X651 uses a 9-DIP module package. Physical dimensions and pin configurations differ. PCB layout modifications are required for mechanical and electrical integration.

Q: What is the significance of the response time difference (400ns vs. 300ns)?

A: The T60404N4646X651 has a faster response time of 300ns compared to the LTS 15-NP/SP7 at 400ns. This faster response is advantageous for high-speed current measurement applications and does not create compatibility issues.

Q: Does the lower supply current requirement of the T60404N4646X651 (15mA vs. 28mA) affect system design?

A: The T60404N4646X651 requires less supply current, reducing power consumption. This is a beneficial characteristic that does not create compatibility constraints and may improve overall system efficiency.

Q: What regulatory compliance should be verified before substitution?

A: Both parts meet environmental compliance standards for their respective markets. The T60404N4646X651 holds ROHS3 and REACH unaffected status. Verify that the target application and market region accept ROHS3 compliance and that REACH unaffected status meets procurement requirements.